http://www.fao.org/giews/earthobservation/asis/index_1.jsp?lang=en

https://search.earthdata.nasa.gov/search?q=NDVI

https://earthmap.org/?layers=%7B%7D&map=%7B%22center%22%3A%7B%22lat%22%3A0%2C%22lng%22%3A0%7D%2C%22zoom%22%3A3%2C%22type%22%3A%22roadmap%22%7D

Erkin and Tuğçe, thank you. I'll look into the various sources you indicated. This is helpful!

Hi Virginie,

Please check this out you may find it useful:

Article A Long-Term Spatiotemporal Analysis of Vegetation Greenness ...

Article The Grass Is Not Always Greener on the Other Side: Seasonal ...

Article Evaluation of Spatio-Temporal Evapotranspiration Using Satel...

Cheers,

Ankur

Hello Virginie Rolland , In addition to the sources already mentioned above, the following website might be of interest for you (regarding the spatial and temporal resolution you need):

http://silvis.forest.wisc.edu/data/dhis/

Cheers Paul

So many options to explore... Thank you, Ankur and Paul.

You can get it by using Landsat 8 imagery

NDVI = (Band 5 – Band 4) / (Band 5 + Band 4)

Hi. You can use Google Earth Engine to have more data (Landsat, MODIS, Sentinel-2) to get NDVI from different sources

Dear Virginie, maybe you can get data vegetation from USGS

EarthExplorer (usgs.gov),

regards

You can use the GEE app to get the NDVI data

Dear Virginie Rolland,

You can download it from

https://www.ncei.noaa.gov/products/climate-data-records/normalized-difference-vegetation-index

(Daily output on a 0.05° by 0.05° grid, from 1981–present)

The data provided on MODIS may be useful to you

Go here (after creating an account on earthdata.gov)

http://daac.ornl.gov/cgi-bin/MODIS/GLBVIZ_1_Glb/modis_subset_order_global_col5.pl